Scaffolding device.



P. B. JOHNSTON.

SGAFFOLDING DEVICE.

Fm APPLICATION TILBI)OGT.17.1913. D 1,1 2 [9446, latented F9119, 1915.

2 SHEETS-SHEET 1.

@10 10 @fa /a F. B. JOHNSTON.

l SGAFFOLDING DEVICE.

APPLICATION FILED cm1?. 191s.

341214450 Patented Feb. 9, 1915.Y .A 2 SHEETS-SHEET 2.

M* M QTQ u* k j /f mom/Er. r

lilhllllildll B: JOHNSTN, F RSELLE scanner-nine envien.

Specification of Letters Eatent,

Patented Eolo. d, igllie .Application led october l?, 1913. Serial No.V 7955EA To all whom it may concern Be it known that I FRANK B. donneront f a citizen of the United States, residing in Roselle Park, Union county, New Jersey, have invented certain new and useful lmprovenientlsin Scailolding Devices, of which the following is a specification.

This invention has for its object to provide va hanging scallold for use in the construction oli `buildings, which shall be firmly and removably secured in place on the ifi-aine of the building beingr erected, and which shall have the necessary strength and re-- sistance to the strains of use to ailord a safe structure for supporting the Workmen and aterials. l? or this. purpose, the scaffold is provided. with tn'o;\siipei'posed platforms, the additional plat-form serving to materially sti lien, steady and strengthen the entire structure, Also, the outriggers of thesca'ffold are secured in place by removable U-shaped clamps having swinging knuckles which engage the Web of the Outrigger and thereby secure the same reliably in place on the supporting beam of the building.

'The hanging structure of the scaffold coinorisc vertical, dependent, supporting-meiniaeirs, Aplatforn'is 'supported thereon, and a horizontal member connecting the vertical members and assisting in the support oi the same and the platforms, and forming a.

guardrail for the workmen.

In the accompanying drawing, Figure l is a iront-vie',r of a scalold embodying the invention, Fig. 2 is a Vertical section on line "-2 oi Fig. l, on a larger scale, Fig. il is a perspective View showingr the means of fastelling an Outrigger in place, Fig. l is a .top- View of Fig. 3, and Figs. 5 and (3 show dit'- ierent forms of scaffold with double platforms.

Similar reference numerals indicate correspondingr parts in all the figures.

,Euch olil the 'outriggers l() rests upon and is secured at its inner end to one of the horizontal beams 1l oil the building, by means of a clamp comprising' a U-sliaped member 1:2 of bar or round iron threaded at its ends. above the plane of the outrigger. crossplate 13 connects the two ends, and above the plate suitable nuts 14 are screwed on the said ends, thus fastening the outrigger in The ends project up\\'ardly place against Vertical movement from the beam il.. The friction of the plate 13 With the Outrigger is in practice not sufficient to entirely prevent the lateral :movement of the Outrigger on the beam ll. For preventing such movement, swinging knuckles l5 are provided. piroted one on each 4leg of the U-eliaped nieinber l2, in suclrposition'as when swung inward y into locking position to. enter between the upper' and lower flanges and engage between them with clamping pressure the web of the ffl-beam forming the Outrigger. corners or" each knuckle is rounded as shown at 16, inv Fig. el, so that the knuckle may be readily knocked into place by a hammer or other suitable tool. The end-faces of the knuckles are fiat, as shou'n `in Fig. 4, that is, tangential to thepath of swinging Inovement of the knuckle, so that V`by the seating of these ends on the dat vertical web of the ,I-bearn they resist displacement oli the de; rice For closing. the knuckles they are moved in the direction indicated by the ai1 rows 1S, in Fig. l.

Tothe outriggers 10 are attached by suit able shackles, dependingn cables 20, each of which is secured at its lower end to a manuullypei-able hoistingdcvice 2l W ierehy the @ne of the inner cables may be .individually released orv Wound up and the 'Hoor-system of the scsi 'fold thereby lowered or raised. The hoistf ing-derce is well known and requires no.

detail description.

The hoisting-devices 2l shown in Figs. 1 and 2 support double put-logs 22, and

clamps 23, hy which the planks 2l of the upper platform are .secured into a connected platform, all as described in detail in my rco-pending; application Serial No. 78-l,332, filed ugustl, 1813. From the put-logs 22 descend vertical supporting-members 25, preferably of bar-iron or steel, which support at their lower ends in like manner, below v the upper 'ilatform, put-logs 26, to which the plankiiugr 53T of the lower platform is clamped oy like clamps Q8.

Each of the 'vertical supportiiig-members Q5 is provided at a suitable point in its length with an eye 30 or other means for receiving and holding against disengagement a horizontal wire-rope cable 3l, one end of which is secured to one ofthe members 25 by a rope-clamp 32 or other suitable means and the other end of ,w-,eiajrssimilarly secured to -anothermeml'er @25. n intermediate portion of-the scatfolclv from any accident or other cause'becomes unsupported, or insuicie'ntly supported, in its .descent it ten s to draw 'downwardly the 'horizontal supporting cable 31, which the cableresists owing to its secure fastening at its ends, and to ,its support in the eyes of the adjacent vertical members 25. rTherej sistance to longitudinal'collapse afforded by the two platforms between which the cabley is located, together'with the resistance to at the inner side and one at the outer side of.

the platform, as shown in Fig. 2, and they are located atl such height above the platform that they act also as guard-railsin the ordinary use of the scaffold` by workmen, and adord a secure support whichl the Workmen may grasp in case of dangerous tilting of whether vertically or horizonpendently, and auxiliary 4supporting mem- Ithe platform, tally.- Inthe modifications shown inlltfigs. 5 and 6 the structure is capable of being raised and. lowered from the lower platform. `In Fig..

5 the hoisting 1nachinesf40, [are located on the upper plat-form 41, and operated by endless chains 42 depending through the upper platform to y a l point Within reach of the workmen on the lower'platform 43. luf F i g.

6, the machines are located on the lowerplatform 43, the vcables V:20 descend thereto, and the upper vplati "orn 1 46 is carried detachably on cross-beams 44 between suitable posts 45 rising from said lower platform, the upper lplatform in this case .serving chiefly,

or solely, as a roof for-the protection `of the.v

workmen on the lower platform. Numerous embodiments lof the inventio have been shown and described. It is obvious that changes may be inadeltherein Without departing from the spirit of the invention asset forth in the claims.

I claim: y l. ln a scaffolding device, a. scaffold, out-- riggers above a plurality of separated points inthe lengths of said scaffold, rigid supporting members at a plurality of separated l points in the lengths of said scaffold, cables connecting said rigid supporting members to said outriggers, independent and independently operated hoisting mechanisms adapted to raise and lower-said cables, and an aliiln casev an 'iliarysupporting member intern'iediatev and connecting said rigid supl'iortii'ig members.

2. In a scaffolding device, a scaffold, outing members at a .plm-ality of separated p points in the lengths of said sca told, cables connecting said rigid supporting members' to said outriggers, independent and independently operated hoisting mechanisms adapted to raise and lower said cables, and a flexible auxiliary supporting member intermediate and connecting said rigid supporting members.

' 3.' A. scaffolding device comprising an upper longitudinally non-'yielding suspended platform, a lower longitudinally nonyielding platform, vertical non-collapsible members suspending the lower platform from the upper platform, said vertical members being connected to said platform at a plurality of separated points in their lengths,

-outriggers, supporting members for said upper platform, saidy 'supporting members being* attached thereto at a plurality of seb-arated points` in the length of said upper plat'- form, hoistingniechanisms for raising and lowering -said supporting members indebers` intermediateiand connecting said vertical non-collapsible members, and intermediate said platforms. f'

4. A' scaffolding device, comprising an upper longitudinally Iron-yielding suspendcd platform, alower longitudinally nonyielding platform, vertical non-collapsible members suspending the lower platform from the upper platform,'some of saidmemhers being arranged at the inside and others at-.the outside of the platform, said vertical members at the inside and outside being connected to said platformsy at a plurality of separated points in their lengths, outriggers, supporting members connected to said outl riggers for said upper platform, said sup.-

porting-members being,r attached thereto at aplurality ofseparated pointsiin the lengths i of said upper platform, hoistin mechanismsv yforraising and lowering sai supporting members independently, andauxiliary supporting members intermediate andconnecting said vertical non-collapsible members, and intermediate said platforms.

In testimony that I claim the foregoing as iit my invention,.fhave signed my' name in" presence of two subscribing witnesses.

FRANK B. J OHN STGN. Witnesses:

F.' Hoes, G. Lowa. 

